Receive the latest national-international updates in your inbox

Classes at a San Francisco high school resumed resumed Wednesday after four students were shot just outside the campus, prompting a lockdown and sending waves of panic through local parents and students. Pete Suratos reports. (Published Wednesday, Oct. 19, 2016)

Classes at a San Francisco high school are set to resume Wednesday after four students were shot just outside the campus, prompting a lockdown and sending waves of panic through local parents and students.

Police continue to search for four suspects tied to the shooting reported Tuesday afternoon at the parking lot of June Jordan School for Equity, which is located in the city's Excelsior District.

Police said at least three students were shot outside as school was dismissed for the day at around 3:15 p.m. A fourth victim, a male student, walked into the Bayview Police Station in San Francisco hours later with a gunshot wound. All four were students at the school. All four students are 15 years old.

Four male suspects, unaffiliated with the school, approached the campus on foot targeting a student for reasons that are currently unclear, police said. One of the suspects pulled out a gun and began shooting at two male students and a female student, who suffered a life-threatening injury. All three students ran back into the school after they were shot. They were transported to San Francisco General Hospital.

The four suspects, who were all wearing black hoodies, were last seen running away on Brazil Avenue, police said.

San Francisco Unified School District officials said the school immediately went on lockdown after the gunshots were fired because of fears of an active shooter. The lockdown was lifted after the scene was declared safe by police shortly after 4 p.m.

Parents and grandparents came rushing to the school looking for their students after the scene was cleared.

During the initial response, a swarm of police squad cars responded to reports of shots fired at Brazil and La Grande avenues.

Students were too shaken to speak on camera to NBC Bay Area, but said they heard what sounded like fireworks right when school was letting out. Dozens of students came running back into the school.